Class-6 Air Around Us

Q1: The blanket of gases that surrounds the earth is called __________.

• air
• atmosphere
• ithosphere
• biosphere

Q2: Which one of the following has the major part in air?

• Nitrogen 
• Oxygen
• Carbon Dioxide 
• Helium

Q3: Identify the gas "Odourless, Colourless, Heavier than air, supports

• Nitrogen
• Oxygen
• Carbon Dioxide
• Water vapours

Q4: Which one of the following statement is TRUE?

• Air is opaque
• Air is made of one substance only.
• Air contains water vapour
• Air contains large amount of inert gases

Q5: Which gas is produced by plants during photosynthesis?

• Nitrogen
• Carbon Dioxide
• Hydrogen
  
  
• Oxygen

Q6: A gas is colourless, odourless, heavier than air and extinguishes fire. Name
the gas?

• Nitrogen
• Carbon Dioxide
• Hydrogen
• Oxygen

Q7: Which gas present in atmosphere allows substances to burn?

• Nitrogen
• Carbon Dioxide
• Oxygen
• Ozone

Q8: Clothes dry faster when there is ______ water vapour in air.

• less
• more
• either less or more
• none of these

Q9: Hot air balloon rises up in the air because?

• hot air is heavier than cold air
• hot air is lighter than cold air
• hot air does not play any role in rising up the balloon
• hot air contains water vapours which push up the balloon

Q10: Removal of water from plant bodies in the form of vapours is called _______.

• Photosynthesis
  
  
• Respiration
• Transpiration
• Circulation